1. 1 Topic Report Voreen Reporter: Chia-Kai Chang Advisor: Sheng-Lung Huang Date: 2012/8/9

2. Outline About Voreen Start up Prepare volume data Using Voreen  Basic 2

3. About Voreen Voreen is an open source volume rendering engine which allows interactive visualization of volumetric data sets with high flexibility when integrating new visualization techniques. Using OpenGL and GLSL for GPU-based rendering, licensed under the terms of the GNU General Public License v2. The Voreen project emerged from the project Z1 "Interactive 3D-visualization of medical imaging data for the non-invasive analysis of cardiovascular processes and structures" being part of the collaborative research center SFB 656 MoBil - Molecular Cardiovascular Imaging. It has been initiated and is maintained by the Visualization and Computer Graphics Research Group (VisCG) at the Department of Computer Science at the University of Münster. 3

4. Developers: ~13 full- and part-time Lines of Code: 206.115+ Support CUDA Support for several volume file formats (RAW, DICOM, TIFF-stacks, PVM, Philips 3D US, NRRD, vevo,...) 4 Ref: http://www.voreen.org/420-Tutorial-Slides.html

5. Gallery 5

6. Voreen Architecture 6

7. Start up 到 Voreen 網站 (http://www.voreen.org/) ，點選 download 下載http://www.voreen.org/  VoreenVE 3.0.1 Windows Archive 這個是直接執行檔，免安裝  VoreenVE 3.0.1 Windows Installer 安裝程式， voreen 就會安裝到 program files 資料夾  VoreenVE 3.0.1 Mac Application Bundle 這是給 MAC OS 使用的檔案 建議使用免安裝版本，下載後解壓縮，程式執行檔 為 voreenve.exe 7

8. Voreen 程式介面 8

9. 9 1 2 3 4 5 1.The network editor 2.Canvas window 3.Processors list 4.Properties 5.Volume container

10. Toolbar New Workspace - Create a new empty workspace. Open Workspace... - Load an existing workspace. Save Workspace - Save the current workspace. Save Workspace as... - Save as different file name. Load Data Set... - Load a volume data set. Development Mode - Switch to development mode. Visualization Mode - Switch to visualization mode. Processors - Hide/show the processor list (only available in network mode). Properties - Hide/show the property view. Volumes - Hide/show information about the currently loaded volume data sets. Input Mapping - Hide/show the currently set input mapping for handling keyboard and mouse events. Debug Console - Hide/show a debug console containing log messages. Render Targets - Hide/show the render target view, which shows intermediate rendering results, useful for debugging. Snapshot - Save the content of one of the canvases into an image file. Animation - Create animations using camera paths and save these animations as videos. Rebuild Shaders - Rebuild all currently load shader programs, which allows runtime shader editing with external programs. 10

11. Network and Workspace Network Workspace 11 儲存各種參數，如 volume data source 、顏色、方向、 角度，內容包含 network XML 格式 副檔名為：.vws 描述資料處理的流程

12. Load Volume 12 Select *.dat file

13. Volume data 13 Raw data Filename Resolution Thickness Format Model Modality

14. 修改 dat 檔 在 dat 檔有兩個參數是要注意的分別是 resolution 跟 slice thickness. 如果 volume data 的為維度是 10x10x1000(resolution) ， slice thickness 是 1x1x1 ，那麼整個 volume 在 Voreen 會被拉長。 Slice thickness 就是三個維度中， element 之間的距離 如果要讓 volume 在 Voreen 看起來像是立方體，則要 調正 slice thickness 以上例， slice thickness 要調整為： 1x1x0.01 14

15. 15

16. Prepare volume data 下載 Data Converter 軟體 ( 實驗室 FTP  /software/Lab/Data Converter) ，並自行安裝 OCT 實驗做完後，把資料上傳到網站，再使用 Data Converter 轉檔。轉檔後，會在原資料夾生成 *.dat 跟 *.raw 兩個檔案。 使用 Data Converter 生成合適的 volume data ，再讀入 Voreen Data Converter 畫面： 16

17. 資料上傳步驟 17 21

18. 18 345

19. 19 9786

20. 20 10

21. Data Converter 使用方式 1. 選擇 volume data 並匯入 2. 讀出某 slice 查閱 圖片內容，選擇 想要 convert 的 slice 3. 設定匯出檔名 4. 調整參數 5. 確定匯出 21 12345

22. 可調整的參數 1. 行與列的資料範圍 2. 移動平均 3. 資料縮減 4. 轉置 5. 旋轉 6.Gaussian Transform Kernal 7.Other… 22

23. 重點回顧 了解 Voreen 的基本歷史 DataXper 資料上傳 Data Converter 建立 Voreen 資料檔案 23

24. Using Voreen 資料流的概念，從上到下 24

25. Dev. Mode & Vis. Mode 25

26. Transfer Functions 26 按住 Shift 再按滑鼠左鍵移動，可垂直上下移動

27. Multi-Volume 27

28. 28 Thanks for your attention